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12.0 Maintenance
12.1 Water inlet fi lter
The inlet water connection (pos. 1) contains
a fi lter to prevent impurities entering the high-
pressure pump. This fi lter must be inspected at
regular intervals, and cleaned as required. The
fi lter can be removed after removing the quick
coupling.
NOTE:
To avoid serious damage to the rubber gasket,
the quick coupling should be tightened only
gently.
12.2 Couplings/connectors
To prevent leakage and damage to connectors/
couplings on hoses, spray handle, machine and
spray lance, these need to be cleaned occasio-
nally and lightly lubricated with oil or grease.
12.3 Oil Change
The oil level must be checked at regular intervals
(see section 9.1). The oil should be changed ac-
cording to the following guidelines:
1. OIL CHANGE FOR PUMP
Change the oil after 1000 hours of operation, or
when the oil appears "milk-white". Take off the
cover of the oil glass (pos. 2). Unscrew the oil
drain plug on the bottom of the pump (pos. 3).
Drain the oil and then clean the dirt off the drain
plug. Screw the plug in and top up the pump with
fresh oil through the oil glass.
The pump holds approximately 1 quart (1 litre)
of zincless hydraulic oil. From Nilfi sk-ALTO the
pump is fi lled with Nilfi sk-ALTO Pump Oil 100.
When refi lling and changing the oil this or a
substitute with the following specifi cations may
be used:
Zincless Hydraulic Oil
ISO no. 100
Viscosity Index (VI) min. 130
Pour Point below -30°C
SLUDGE CONTAINER
It is normal for a small amount of oil and water
to get past their seals. This oil/ water is collected
in a sludge container (pos. 4). Empty the contai-
ner before it has fi lled completely. This oil/water
mixture must not be re-used in the pump.
46
2. ENGINE OIL CHANGE
Refer to the Ruggerini engine manual for break-
in and normal operating oil change requirements.
Carry out fi rst oil change after i0 hours of ope-
ration and then every 100 hours. Not less than
once every six months, however.
NOTE: Protect the environment by properly
disposing of used pump and engine oil.
12.4 Burner fuel fi lter
To prevent foreign material from entering the fuel
pump a fi lter (14) is fi tted between the fuel tank
and the fuel pump. This fi lter must be changed
regularly, the frequency depends on the purity
of the fuel. Replacement of the fi lter each year is
recommended. See also diagnosis of faults and
repair 16.0.
12.5 Descaling
After a period of operation depending on the
hardness of the water, scale deposits will begin
to accumulate in the heating coil. These deposits
will reduce the effect of the water heating system
and increase the fuel consumption. The machine
should therefore be descaled regularly. If the
machine adjusted on maximum water volume will
not heat cold water (8°C/47°F) to 70°C (158°F)
within three minutes, the burner or coil require
servicing or descaling, as follows:
NOTE:
Always carry out the descaling according to the
instructions supplied with the descaling product:
1. Disconnect the high pressure hose
2. Place an inlet hose in a container of at least
10 l (3 gallon) capacity, with a solution of
recognized descaling product (i.e. Nilfi sk-ALTO
STONEX), and water in the recommended
percentage (not normally over 10% of the
descaling product ratio 1:10). Ask your Nilfi sk-
ALTO distributor for recommendations.
3. Start the machine.
4. Switch off the machine when the water from
the outlet fi tting is colored by the scale rem-
over.
WARNING! The solution can be caustic. Note:
Air must in no circumstances get into the sy stem;
therefore the container with scale rem over must
never be emptied completely.
EN
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